Compare Samyang 12mm F2.8 ED AS NCS Fisheye vs Samyang 20mm F1.8 ED AS UMC vs Canon EF 24-105mm F3.5-5.6
Construction
Aperture Blades
7 blades, Circular blades
7 blades
7 blades
Colors
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Standard Zoom Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring, Distance scale
Distance scale
Lens Mount
Canon EF-mount, Nikon F-mount, Pentax K-mount, Sony A-mount, Sony E-mount
Canon EF-mount, Canon EF-M-mount, Fujifilm X-mount, Micro Four Thirds-mount, Nikon F-mount, Pentax K-mount, Samsung NX-mount, Sony A-mount, Sony E-mount
Canon EF-mount
Motor
Stepper motor
Optical Formula | Elements
12 elements
13 elements
17 elements
Optical Formula | Groups
8 groups
12 groups
13 groups
Optical Formula | Special Glass
2 aspherical, 3 ED, nano coating system groups
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
77 mm / 3.03 in
Size | Diameter
77 mm / 3.03 in
83 mm / 3.27 in
83 mm / 3.27 in
Size | Length
73 mm / 2.87 in
88 mm / 3.46 in
104 mm / 4.09 in
Weight
515 g / 18.20 oz
497 g / 17.56 oz
525 g / 18.55 oz
Function
Angle Of View
180° Diagonal (fisheye)
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical (wide) ~ 23.3° Diagonal | 19.5° Horizontal | 13.0° Vertical (tele)
Aperture
f/2.8 ~ f/22
f/1.8 ~ f/22
f/3.5–5.6 ~ f/22–32
Autofocus
No
No
Yes
Focal Length
12 mm
20 mm
24 mm ~ 105 mm
Focus Type
Internal
Internal
Extending front
Image Stabilization
No
No
Yes
Weather Resistance
No
No
No
Zoom Type
External zoom
Performance
Max Magnification
0.3x
Min Focus Distance
200 mm / 7.87 in
200 mm / 7.87 in
400 mm / 15.75 in
Production
Accessory
Lens hood included
Lens hood included
Lens Hood: EW-83M (sold separately), LP1219 lens pouch
Debut
2014-11-01
2016-08-08
2014-09-15
Reviews
Neofiliac score
40%
59%
52%
Pros
- 180° FOV
- Reasonably good sunstar
- Rather affordable
- Optically stabilized
- Useful zoom range
Cons
- Lacks front filter thread
- Lacks weather sealing
- Not the sharpest
- Lacks weather sealing
- Not the highest grade of build
- External zoom without zoom lock
- Lens hood not included
- Lacks weather sealing
- Not the highest build grade from Canon
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